Improvement in diaphragms for gas-governors



UNITED STA ES PATENT OFFICE.

WALTER FROST, OF NEWARK, NEW JERSEY.

IMPROVEMENT lN DlAPHRAGM S FOR GAS-GOVERNORS.

Specification forming part of Letters Patent No. 165,161, dated July 6,1875; application filed March 25, 1875.

To all whom it may concern:

Be it known that I, WALTER Fnosr, of Newark, in the county of Essex andState of New Jersey, have invented a certain Improvement in DiaphragmGas-Governors, of which the following is a specification:

My invention consists in the coating of the leather composing thediaphragm of a gasgovernor, by which it is rendered impervious to anygas made for illuminating purposes.

The diaphragms commonly used are coated with whale-oil or other similaroil; but it is found that the present mode of preparation will notresist the action of gas made from gasoline, rosin, naphtha, and thelike, and will notpreventtheescapiugof these gases through the pores ofthe leather into the room, producing great annoyance. To remedy thisdifficulty is the objectof this invention; and this I do by coating theleather composing the diaphragm With a composition of glycerine andcastor-oil, in about equal proportions,

and the leather thus prepared I have found will be perfectly unporous,and still remain as soft and pliable as in the use of any other oils.This composition is also found to resist the action of heat and cold,and to render the diaphragn always capable of securing the gas in thegovernor, and from escaping into the room.

There is nothing new about any part of the mechanism of the governor;but rendering the diaphragm'impervious to gas, as shown,

